How is boost controlled on a non wastegate van turbo. - Ford Powerstroke Diesel Forum
 
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post #1 of 8 Old 04-08-2011, 12:50 PM Thread Starter
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How is boost controlled on a non wastegate van turbo.

Simple question, just can't seam to find the answer. Thanks.
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post #2 of 8 Old 04-08-2011, 01:19 PM
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im thinking map sees certain amount of boost than cuts fuel so it stays
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post #3 of 8 Old 04-08-2011, 01:45 PM
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^ what he said.

After 24psi (MAP) I believe it is, the PCM will de-fuel to manage boost. It can be bypassed with a boost fooler if you are pushing more then 24 psi.
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post #4 of 8 Old 04-08-2011, 02:14 PM
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You control it with your right foot essentially.


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post #5 of 8 Old 04-08-2011, 03:17 PM Thread Starter
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Thanks guys. Why do they even make a wastegate then if you can just control it with fuel? That’s one more part that they have to manufacture and has the potential of failing. Software is free and can't brake.
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post #6 of 8 Old 04-08-2011, 08:01 PM
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Quote:
Originally Posted by rlyons124 View Post
Thanks guys. Why do they even make a wastegate then if you can just control it with fuel? That’s one more part that they have to manufacture and has the potential of failing. Software is free and can't brake.
The truck also has the "software," but as a secondary measure of high boost protection. The wastegate will bleed off pressure for you. This way, you can continue to inject the maximum amount of fuel possible. Without the wastegate to bleed pressure it could, potentially, build enough boost to defuel the engine. If it just cut the fueling down to reduce boost you would be making less power.

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post #7 of 8 Old 04-09-2011, 05:17 AM
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Trucks have had non waste gate turbos for 50 years, wastegates have been a recent addition to the turbocharger, it is an engineered system that provides the correct amount of boost for that size engine under full load. If you look at Mack engines as well as cummmins, cat, and detroit from ten years ago and back, they have no wastegate. The good part is that since the addition of the wastegate we can have a better turbo that produces boost at a lower rpm and dump the excess exhaust at higher rpm when that extra boost could damage the turbo. Its kind of like carburetor and fuel injection, one old tech and one new tech.

Paul
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post #8 of 8 Old 04-09-2011, 06:28 PM Thread Starter
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Thanks for the info guys.
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